Remote Control
R&S
®
RTM20xx
242
User Manual 1317.4726.02 ─ 01
SCPI-confirmed commands are explicitly marked in the command reference chapters.
Commands without SCPI label are device-specific, however, their syntax follows SCPI
rules.
15.1.1.1
LAN Interface
The R&S
RTM is equipped with a network interface and can be connected to an Ethernet
LAN (local area network) for remote control of the instrument. The instrument accepts
remote commands via the LAN interface using the VISA library. VISA must be installed
on the control computer.
The R&S
RTM supports two ways of LAN communication:
●
VXI-11 protocol: a protocol that has been specifically developed for test and mea-
surement instruments. It is the recommended protocol for remote control via LAN.
●
Raw socket mode: a synchronous, streaming oriented protocol. Consequently, raw
socket communication does not support asynchronous events like Service Request
(SRQ) or Device Clear (DCL).
See also:
chapter 15.1.2, "Setting Up a LAN Connection"
VXI-11 Protocol
The VXI-11 standard is based on the ONC RPC (Open Network Computing Remote
Procedure Call) protocol which in turn relies on TCP/IP as the network/transport layer.
The TCP/IP network protocol and the associated network services are preconfigured.
TCP/IP ensures connection-oriented communication, where the order of the exchanged
messages is adhered to and interrupted links are identified. With this protocol, messages
cannot be lost.
15.1.1.2
USB Interface
For remote control via the USB connection, the PC and the instrument must be connected
via the USB type B interface. The USB connection requires the VISA library and the USB
driver to be installed. VISA detects the R&S instrument at the assigned serial port when
the USB connection is established. You do not have to enter an address string.
Contact your Rohde & Schwarz service center to get the USB driver.
15.1.1.3
GPIB Interface (IEC/IEEE Bus Interface)
The GBIP interface is optional (option RTM-B10). It replaces the LAN / USB type B inter-
face module on the rear panel. Thus, remote control is possible either with LAN or USB
connection, or with GBIP.
To be able to control the instrument via the GPIB bus, the instrument and the controller
must be linked by a GPIB bus cable. A GPIB bus card, the card drivers and the program
libraries for the programming language must be provided in the controller. The controller
must address the instrument with the GPIB instrument address.
Basics